Then go to old East Berlin. There you can meet them in many street crossings.

Ampelmännchen pedestrian signals were created in 1961 by traffic psychologist Karl Peglau. Today, in reunited Berlin, they are not only seen in pedestrian traffic lights, but also in mugs, lamps, art – you name it. These signs have become a symbol of Ostalgie.

(The picture is a double exposure to show both ‘go’ and ‘no-go’ in the same image. The lights were working perfectly in real life.)